Packaging bag

ABSTRACT

To provide a packaging bag that is hardly opened erroneously, can be easily opened, and can simply make an unused article to be packaged held and packaged in the packaging bag. 
     The problem is solved by a packaging bag that is a gusset packaging bag including: a main unit section having a front surface, a back surface, and both side surfaces connecting the front surface and the back surface to each other, the main unit section storing an article to be packaged; and a handle section formed on a top side of the main unit section by overlapping the front surface and the back surface with each other, in which at least one of the front surface and the back surface of the main unit section has an opening forming portion, and the opening forming portion includes: a base point portion formed in a region located above a position corresponding to an uppermost portion of the article to be packaged that is stored in the main unit section and below the handle section; a pair of widening perforated portions having a gradually widening separation distance in a side surface direction from the base point portion toward a bottom side opposite to the top side; and a pair of extending perforated portions extending from the widening perforated portions in a top-bottom direction.

TECHNICAL FIELD

The present invention relates to a packaging bag.

BACKGROUND ART

A packaging bag for packaging one or a plurality of film-packagedtissues in which a bundle of tissue paper is packaged with a resinflexible film includes a main unit section in which an article to bepackaged is stored, and a handle section provided above the main unitsection.

In such a packaging bag, a finger hook hole for hooking a finger isformed in the handle section, and a purchaser or the like of thefilm-packaged tissue can carry the film-packaged tissue stored in thepackaging bag by hooking a finger into the finger hook hole.

On the other hand, in a packaging bag for packaging a product such as atoilet roll, an opening forming portion for forming an opening port fortaking out an article to be packaged is provided on an upper surface ora top surface portion (Patent Literature 1 below), but the openingforming portion for a toilet roll is not necessarily suitable for afilm-packaged tissue having a shape and softness different from thetoilet roll.

In a packaging bag in which a plurality of film-packaged tissues eachhaving flexibility and a substantially rectangular outer shape iscollectively formed into assembly packaging, the thickness of the filmmay be increased and the opening forming portion may not be providedfrom viewpoints of easily holding the shape at the time of assemblypackaging and preventing breakage at the time of transportation.

CITATION LIST Patent Literature

Patent Literature 1: JP 2004-058654 A

SUMMARY OF INVENTION Technical Problem

However, when the thickness of the film is increased and the openingforming portion is provided, it is naturally difficult to open thepackaging bag. In addition, an opening portion is disordered, anappearance is deteriorated, and a hygienic impression is not given.Furthermore, it is not preferable for a user that contents cannot beeasily taken out in the assembly packaging product.

Therefore, a main object of the present invention is to provide apackaging bag which is hardly opened erroneously when an article to bepackaged is carried, can be easily opened to make it possible to takeout contents, and can make an unused article to be packaged simply heldand packaged in the packaging bag.

Solution to Problem

Means for solving the above problems are as follows.

A first means is

a packaging bag that is a gusset packaging bag including: a main unitsection having a front surface, a back surface, and both side surfacesconnecting the front surface and the back surface to each other, themain unit section storing an article to be packaged; and

a handle section formed on a top side of the main unit section byoverlapping the front surface and the back surface with each other,wherein

at least one of the front surface and the back surface of the main unitsection has an opening forming portion, and

the opening forming portion includes:

a base point portion formed in a region located above a positioncorresponding to an uppermost portion of the article to be packaged thatis stored in the main unit section and below the handle section;

a pair of widening perforated portions having a gradually wideningseparation distance in a side surface direction from the base pointportion toward a bottom side opposite to the top side; and

a pair of extending perforated portions continuous with other ends ofthe widening perforated portions on a base portion side and extending ina top-bottom direction.

The second means is

the packaging bag according to the first means, wherein the base pointportion is a region surrounded by perforations or slits.

The third means is

the packaging bag according to the first means, wherein a connectingportion between the base point portion and the widening perforatedportion is a cut portion.

The fourth means is

the packaging bag according to the first means, wherein a connectingportion between the widening perforated portion and the extendingperforated portion is an easily tearable portion that is more easilytorn than another portion in the widening perforated portion and theextending perforated portion.

A fifth means is

the packaging bag according to the first means, wherein a boundarybetween the widening perforated portion and the extending perforatedportion or the vicinity thereof is located at a position correspondingto an uppermost portion of an article to be packaged that is stored inthe main unit section or in the vicinity thereof.

The sixth means is

the packaging bag according to the first means, wherein the extendingperforated portion is in a range of 5 to 20 mm from a side surface.

Advantageous Effects of Invention

The present invention described above provides a packaging bag which ishardly opened erroneously when an article to be packaged is carried, canbe easily opened to make it possible to take out contents, and can makean unused article to be packaged simply held and packaged in thepackaging bag.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a front view of a packaging bag according to the presentinvention.

FIG. 2 is a cross-sectional view taken along line B-B in FIG. 1.

FIG. 3 is a perspective view for explaining an outline of the packagingbag according to the present invention.

FIG. 4 is a perspective view for explaining the packaging bag accordingto the present invention and a film-packaged tissue assembly packageusing the packaging bag.

FIG. 5 is a perspective view for explaining an opening forming portionaccording to the present invention.

FIG. 6 is a perspective view for explaining an opening mode of thepackaging bag according to the present invention.

FIG. 7 is a perspective view for explaining an example of afilm-packaged tissue which is an article to be packaged according to thepresent invention.

FIG. 8 is a perspective view for explaining a structural example of thefilm-packaged tissue which is the article to be packaged according tothe present invention.

FIG. 9 is a perspective view for explaining a tissue paper bundle.

DESCRIPTION OF EMBODIMENTS

Hereinafter, the present invention will be described with reference toFIGS. 1 to 9 illustrating an embodiment of the present invention.

A packaging bag 14 according to the present invention is a gussetpackaging bag 14 including: a main unit section 44 having a frontsurface 46, a back surface 46, and both side surfaces 43 and 43connecting the front surface 46 and the back surface 46 to each other,and storing an article 1 to be packaged; and a handle section 45 formedon a top side of the main unit section 44 by overlapping the frontsurface 46 and the back surface 46. Note that hereinafter, afilm-packaged tissue 1 will be mainly described as an example of anarticle to be packaged, but the article to be packaged is notnecessarily limited to the film-packaged tissue. For example, a productobtained by film-packaging a bundle of domestic thin sheets, such as afilm packaged paper towel, can be used.

The main unit section 44 includes a bag-shaped space, and is closed withbonding portions 41 and 42 bonded by thermal fusion or the like on topand bottom sides in a state where the article 1 to be packaged iscontained. For example, as particularly illustrated in FIGS. 2 and 3, inthe gusset packaging bag 14, in a portion on a top surface side in astate where the side surfaces 43 and 43 are folded into the bag innerside and flattened, the front surface 46 and the back surface 46 arethermally fused to seal an opening on the top surface side as a topsurface side sealing portion 41, the top surface side with respect tothe top surface side sealing portion 41 is formed as the handle section45, then a bottom surface side opening 40X of the gusset packaging bag14 in a state where only the top surface side is sealed is expanded, anarticle to be packaged (in the illustrated mode, the film-packagedtissues 1, 1, . . . ) is inserted therefrom, and then the bottom surfaceside is also sealed by an appropriate sealing means such as thermalfusion to form a lower sealing portion 42.

The gusset packaging bag 14 has the side surfaces 43 and 43, which areportions folded in a flat state and are also referred to as gussets orgusset portions, and surfaces connected to the side surfaces 43. Twosurfaces connected to the side surfaces 43 and 43 are the front surface46 and the back surface 46. Note that the front surface 46 and the backsurface 46 are relative to each other, and which surface is defined asthe front surface is not limited.

The handle section 45 is a portion located on the top surface side withrespect to the top surface side sealing portion 41 serving as a topsurface side boundary with the main unit section 44 containing thefilm-packaged tissue 1 as an article to be packaged in order to enhanceportability in a state where the film-packaged tissues 1, 1, . . . arecontained. A finger hook hole 47 is preferably formed in the handlesection 44. By forming the finger hook hole 47 in the handle section 45in this manner, portability of the article to be packaged is enhanced.Note that the shape of the finger hook hole 47 is not limited to theillustrated mode, and a known mode can be adopted.

It is desirable that a gusset packaging film constituting the gussetpackaging bag 14 is a polypropylene film or a polyethylene film fromviewpoints of cost and an opening property. The film preferably has amelting point of 150° C. or lower. Note that a lower melting point ofthe packaging film makes a thermal fusion treatment possible at a lowertemperature, and is more preferable in sealing and forming the handlesection 45. However, when the melting point is excessively low, thepackaging film is more likely to be scratched or a hole is more likelyto be formed in the packaging film particularly due to friction or thelike with the article 1 to be packaged. Therefore, a substantial lowerlimit is 80° C. Examples of the polyethylene film include a linearlow-density polyethylene film (LLDPE), a low-density polyethylene film(LDPE), and a medium-density polyethylene film (MDPE). Among thesefilms, in the present invention, a linear low-density polyethylene filmlayer (LLDPE) having a density of 0.910 to 0.940 g/cm³ and a meltingpoint of 110 to 120° C. is particularly suitable from viewpoints ofthermal fusibility and cost. In addition, a single-layer film of apolyethylene terephthalate film, a nylon film, a polyvinylidene chloridefilm, or an ethylene vinyl alcohol copolymer, a laminate film obtainedby appropriately stacking these films, or a gas barrier film obtained bysubjecting any of these films to a surface treatment such as aluminumvapor deposition may be used. A biomass film derived from a plant rawmaterial such as sugar cane, potato (starch), or corn can also be used.It is also desirable to use a biomass film for the gusset packaging filmfrom a viewpoint of environmental protection.

The thickness of the gusset packaging film constituting the gussetpackaging bag 14 is appropriately selected in consideration of arelationship with the contained article 1 to be packaged in addition tocircumstances peculiar to gusset packaging. The circumstances peculiarto gusset packaging includes tearability that makes opening easy at thetime of opening, abrasion resistance to the contained article to bepackaged, and flexibility that prevents application of an excessive loadto a finger when the gusset packaging bag 14 is carried with a fingerthrough the finger hook hole 47 formed in the handle section 45 inaddition to flexibility, cost, and thermal fusibility at the time ofpackaging.

From such a point, as for the preferable thickness and softness of thegusset packaging film, a thickness measured in conform with JIS P 8118(1998) is 10 to 65 μm, and a softness measured in conform with ahandle-o-meter method in accordance with JIS L 1096 (2010) E method is5.0 to 50.0 cN.

The packaging bag 14 according to the present invention has acharacteristic opening forming portion 5 that makes it difficult toerroneously open the packaging bag 14 when the article 1 to be packagedis carried by holding the handle section 45, makes it possible to takeout the article 1 to be packaged by easily opening the packaging bag 14,and can simply make the unused article 1 to be packaged held andpackaged in the packaging bag. The opening forming portion 5 is formedon at least one of the front surface 46 and the back surface 46 of themain unit section 44.

The opening forming portion 5 according to the present invention has abase point portion 51 formed in a region located above a position Pcorresponding to an uppermost portion of the article 1 to be packagedthat is stored in the main unit section 44 and below the handle section45, a pair of widening perforated portions 52 and 52 having a graduallywidening separation distance in a side surface direction from the basepoint portion 51 toward a bottom side opposite to the top side, and apair of extending perforated portions 53 and 53 extending from thewidening perforated portions 52 and 52 in a top-bottom direction.

An opening 50 having an openable and closable lid-like edge piece 55 isformed on at least one of the front surface 46 and the back surface 46by sequentially tearing the widening perforated portions 52 and theextending perforated portions 53 from the base point portion 51.

The base point portion 51 is a portion serving as a starting point oftearing of the perforated portions 52 and 53, and is, for example, in arange surrounded by perforations or slits in which the packaging film iseasily torn by being pushed with a human finger, and a small edge piece56 that can be picked is formed. The small edge piece 56 may be a smalledge piece cut so as to be picked in advance instead of the small edgepiece that is torn by being pushed with a human finger. The shape of thesmall edge piece 56 is not particularly limited, but is a substantiallycircular shape, a substantially quadrangular shape, or the like. In sucha base point portion 51, for example, only by pushing an index fingertherein, then picking the small edge piece 56 with the index finger anda thumb, and pulling the small edge piece 56 toward a bottom side, thewidening perforated portions 52 and the extending perforated portions 53are continuously torn, and an opening can be easily formed.

The base point portion 51 is in a central portion, preferably at acenter, of the back surface 46 or the front surface 46 in the directionto the both sides. It is desirable that the base point portion 51 is ata position 5 to 15 mm away from a lower edge of the handle section 45,that is, a lower edge of the top surface side sealing portion 41. In thehandle section 45, the gusset packaging film is bonded by thermal fusionor the like and the rigidity is increased, and therefore when the basepoint portion 51 is set to a range of 5 to 15 mm close to the handlesection 45 and is pushed with a finger, the gusset packaging film is notexcessively stretched and is pushed in, and an opening base point can beeasily formed.

As particularly illustrated in FIG. 5, preferable examples of the basepoint portion 51 include a slit and a perforation in which a tie portion(non-cut portion) is formed at least at a portion closest to a topsurface. The lengths of the cut portion and the tie portion in a case offorming a perforation are not particularly limited, but it is desirablethat the cut portion has a length of 0.1 to 15 mm and the tie portionhas a length of 0.1 to 15 mm. The perforations are easily torncontinuously.

The widening perforated portions 52 and 52 are formed in a pair, andeach of the widening perforated portions 52 is continuous with the basepoint portion 51 with the base point portion 51 as a starting point, andis formed such that a separation distance between the wideningperforated portions 52 gradually widens in a side surface direction fromthe base point portion 51 toward a bottom side opposite to the top side.For example, perforations are formed so as to draw a substantiallyinversed V-shape from the base point portion 51 toward a bottom surface.Each of the widening perforated portions 52 may be linear or curved, butit is desirable that each of the widening perforated portions 52 is astraight line in which perforations are easily torn continuously. Notethat the pair of widening perforated portions 52 and 52 do not need tobe arranged symmetrically with respect to a direction along thetop-bottom direction, but it is desirable that the pair of wideningperforated portions 52 and 52 are both straight lines and arrangedsymmetrically with respect to the direction along the top-bottomdirection. When the small edge piece of the base point portion 51 ispicked and pulled, a force is symmetrically applied to the wideningperforated portions 52 and 52, and the pair of widening perforatedportions 52 and 52 is easily torn continuously similarly.

The perforations in the widening perforated portions 52 and 52 are torncontinuously from the base point portion 51 to form an opening wideningfrom the top side toward the bottom side in a substantially invertedV-shape.

In addition, it is desirable that the widening perforated portions 52and 52 extend from the base point portion 51 to a point located at adistance of 40 to 60 mm on the packaging film from the top surface sidesealing portion 41 serving as a lower edge of the handle section 45 tothe bottom side and 5 to 20 mm from a boundary position E between thefront surface 46 or the back surface 46 and the side surface 43 to acenter side in a width direction. Such widening perforated portions 52and 52 are easily torn continuously.

For example, in a case where the article to be packaged has asubstantially rectangular parallelepiped shape like the film-packagedtissue 1 and the articles to be packaged are stacked as in theillustrated example, it is desirable that the separation distance L1between bottom-side ends of the pair of widening perforated portions 52and 52 is more than 90% and 98% or less of a length (width) L2 of thearticle 1 to be packaged. With such an opening, the article 1 to bepackaged can be more easily taken out. In particular, when the article 1to be packaged is a slightly deformable and flexible film-packagedtissue, the article 1 to be packaged can be easily taken out.

The lengths of the cut portion and the tie portion in a perforation inthe widening perforated portion 52 are not particularly limited, but itis desirable that the cut portion has a length of 0.1 to 15 mm and thetie portion has a length of 0.1 to 15 mm. The perforations are easilytorn continuously.

The extending perforated portions 53 and 53 are formed so as to becontinuous with the bottom-side ends of the widening perforated portions52 and 52 and extend from the bottom-side ends in the top-bottomdirection. Therefore, the extending perforated portions 53 and 53 arealso formed in a pair similarly to the widening perforated portions 52and 52. It is desirable that a distance between the pair of extendingperforated portions 53 and 53 is constant as in the illustrated mode,but may widen or narrow toward the bottom side within a range notaffecting a take-out property of a packaging object. In addition, thepair of extending perforations 53 and 53 does not necessarily have thesame length as each other. It is desirable that the extending perforatedportions 53 and 53 are also arranged linearly like the wideningperforated portions 52 and 52. It is desirable that the extendingperforated portions 53 and 53 are at desirable bottom side positions ofthe widening perforated portions 52 and 52, that is, in a range of 5 to20 mm from the side surface 43. A wider opening is formed by theextending perforations 53 and 53, and the article 1 to be packaged canbe easily taken out.

The positions of the bottom-side ends of the extending perforatedportions 53 and 53 are not necessarily limited. However, when theextending perforated portion is arranged up to a bottom of the gussetpackaging bag, a wide opening is formed, and a take-out property isfavorable, but the gusset packaging bag is more likely to be erroneouslyopened when being carried or displayed. In addition, when an excessivelywide opening is formed, an unused film-packaged tissue is more likely tocome out of the opening unintentionally. Therefore, the position of theextending perforated portion on the bottom side is appropriatelydetermined in consideration of an opening property and a storageproperty. The position of the extending perforated portion on the bottomside is preferably designed such that about one or two film-packagedtissues are easily taken out.

More specifically, in a case where the article 1 to be packaged has asubstantially rectangular parallelepiped shape like the film-packagedtissue and the articles 1 to be packaged are stacked as in theillustrated example, it is desirable that the length of the extendingperforated portion 53 in the top-bottom direction is 95 to 110% of alength L4 of the article 1 to be packaged in the top-bottom direction.The article 1 to be packaged is easily taken out. In addition, inconsideration of the general size of the film-packaged tissue, it isdesirable that a specific length L3 of each of the extending perforatedportions 53 and 53 in the top-bottom direction is 35 to 55 mm.

In the opening forming portion 5 configured in this manner, the wideningperforated portions 52 and 52 and the extending perforated portions 53and 53 are easily torn sequentially from the base point portion 51, andthe opening 50 is easily formed. On the other hand, the base pointportion 51 is in a region located above the position P corresponding toan uppermost portion of the article 1 to be packaged that is stored inthe main unit section 44 and below the handle section 45. Therefore, ina case where the handle section 45 is gripped and lifted when thearticle 1 to be packaged is carried or in a state where the article 1 tobe packaged is lifted, the base point portion 51 is hardly rubbedagainst the contained article 1 to be packaged. In addition, when thecentral portion of the handle section 45 in a width direction is grippedby hand, the gusset packaging film is pulled in a directionsubstantially along the extending direction of the widening perforatedportions 52 and 52. Therefore, the widening perforated portions 52 arehardly torn unintentionally. As described above, in the packaging bag 14according to the present invention, the packaging bag 14 is hardlyopened erroneously when the article 1 to be packaged is carried, and thepackaging bag 14 can be easily opened to take out the article 1 to bepackaged.

Furthermore, in the opening forming portion 5 according to the presentinvention, when the widening perforated portions 52 and 52 and theextending perforated portions 53 and 53 are torn, a top side portionwith respect to bottom-side ends of the extending perforated portions 53and 53 is present as a free lid-like edge piece 56. For this reason, forexample, after some of the contained articles 1 to be packaged are takenout for use, by placing the lid-like edge piece 56 on remaining unusedarticles to be packaged, and further placing a part of the packaging bag14 on a top side with respect to an uppermost position of the unusedarticles 1 to be packaged remaining in the bag on the lid-like edgepiece 56, the unused articles 1 to be packaged can be simply held andpackaged in the packaging bag.

Here, in the opening forming portion 5 according to the presentinvention, in particular, it is desirable that a connecting portion 61between the base point portion 51 and the widening perforated portion 52is a cut portion. The perforations are smoothly torn from the base pointportion 51 to the widening perforated portion 52.

Furthermore, in the opening 50 according to the present invention, inparticular, it is desirable that connecting portions 62 between thewidening perforated portions 52 and 52 and the extending perforatedportions 53 and 53 are easily tearable portions that are more easilytorn than another portion of the widening perforated portions 52 and theextending perforated portions 53. Since the widening perforated portions52 and the extending perforated portions 53 extend in differentdirections, when the widening perforated portions 52 and the extendingperforated portions 53 are sequentially torn from the base point portion51, a perforation tearing direction changes at the connecting portions62 between the widening perforated portions 52 and the extendingperforated portions 53. Therefore, when the connecting portions 62between the widening perforated portions 52 and the extending perforatedportions 53 are easily tearable portions that are more easily torn thananother portion, tearing of the perforations smoothly proceeds from thewidening perforated portions 52 to the extending perforated portions 53.The easily tearable portion 62 can be, for example, a portion in whichthe connecting portion 62 is formed of only a cut portion or a portionin which the length of a cut portion of the perforation is longer thanthat in another portion.

In addition, in the packaging bag 14 according to the present invention,it is desirable that a boundary between the widening perforated portion52 and the extending perforated portion 53 or the vicinity thereof islocated at the position P corresponding to an uppermost portion of thearticle 1 to be packaged that is stored in the main unit section or inthe vicinity thereof. When the article 1 to be packaged is carried, thewidening perforated portion 52 is hardly torn unintentionally. On theother hand, a wide opening is formed by the extending perforated portion53 from the vicinity of the uppermost portion position P toward thebottom side, and therefore the article 1 to be packaged is easily takenout.

Here, as in the illustrated example, the packaging bag 14 of the presentinvention is suitable for forming the film-packaged tissue 1 obtained bypackaging the bundle 3 obtained by folding and stacking a plurality ofsets of tissue paper 2 with the flexible packaging film 4 into anarticle to be packaged, and particularly arranging and gusset-packaginga plurality of the film-packaged tissues 1 to form a film-packagedtissue assembly package 10 (hereinafter, also referred to as an assemblypackage). Such an assembly package 10 is also proposed as the presentinvention. Note that the film-packaged tissue 1 here is not a portableone called a pocket tissue, but is the film-packaged tissue 1 used as astationary type having a mass heavier than that of such a portable one.

For the film-packaged tissue 1 suitable as the article 1 to be packaged,the bundle 3 may be overlap-packaged or pillow-packaged. Particularly asillustrated in FIGS. 7 and 8, the overlap packaging is a packaging modealso referred to as caramel packaging or combined packaging, and is apackaging mode in which the bundle 3 is packaged with the packaging film4 so as to be wrapped in a tubular shape such that openings 4Z areformed at both ends in a longitudinal direction, a portion 4Xoverlapping in the wrapping direction is bonded by a fusion treatment oran adhesive, a portion 4Y extending beyond the bundle 3 is folded towardan end surface side of the bundle 3 from the vicinity of two opposingedges of a bundle end surface, at least tip edges of substantiallytriangular or substantially trapezoidal pieces formed at this time areoverlapped and bonded by a fusion treatment or an adhesive to seal atube opening 4Z, thus forming an end surface 4A.

In this overlap packaging, since the end surface 4A has a substantiallyplanar shape, particularly an exterior of the packaging film 4 has asubstantially rectangular parallelepiped shape close to a box. Inaddition, the end surface 4A is formed by stacking and bonding aplurality of layers of the packaging film 4, and therefore has highrigidity, is hardly crushed, and easily maintains a substantiallyrectangular parallelepiped shape. Therefore, when the film-packagedtissue 1 is stored as the article 1 to be packaged in the packaging bag14 according to the present invention, the shape of the packaging bag iseasily stabilized, the film-packaged tissue 1 is excellent inportability, the film-packaged tissue 1 is hardly moved unintentionallyin the packaging bag 14, and the effect of the packaging bag accordingto the present invention is easily exhibited.

When the film-packaged tissue 1 is used as the article 1 to be packaged,as an arrangement mode in the gusset packaging bag 14, it is desirablethat the film-packaged tissues 1 are stacked such that upper and bottomsurfaces of the film-packaged tissues 1 butt against each other as inthe illustrated mode. The plurality of film-packaged tissues 1, 1, . . .are arranged so as to form a substantially rectangular parallelepiped asa whole, stability and shape retention are enhanced as a whole of theassembly, and the plurality of film-packaged tissues 1, 1, . . . ishardly collapsed or crushed by an external force, and the effect of thepackaging bag according to the present invention is more easilyexhibited.

Here, particularly in this case, it is desirable that the softness ofthe gusset packaging film constituting the gusset packaging bag 14 islower than the softness of the packaging film 4 constituting thefilm-packaged tissue 1. In the gusset packaging bag 14 having the handlesection 45 on the top surface side, when the handle section 45 is held,the gusset packaging bag 14 is pulled in the top-bottom direction.Therefore, pressure may be applied to the film-packaged tissues 1, 1 . .. , which is an article to be contained at this time. However, bylowering the softness of the gusset packaging film 14, the rectangularparallelepiped shape of the contained film-packaged tissue 1 is hardlydeformed, and fullness is hardly reduced without pressing the bundle 3inside.

The bundle 3 of tissue paper contained in the film-packaged tissue 1 isnot particularly limited, but it is desirable that the bundle 3 is apop-up type as illustrated in FIG. 9. The pop-up type bundle 3 isobtained by folding a sheet of the tissue paper 2 having a substantiallyrectangular shape of about 197±10 mm in length×217±10 mm in width inhalf, and stacking a plurality of folded sheets of the tissue paper 2such that folded pieces 2B of other sheets of the tissue paper 2 locatedabove and below the folded sheet are located in an inner side 2A of thefolded sheet. When one folded piece of an uppermost sheet is liftedupward, a folded piece 2B of another sheet adjacent to the lifted sheetimmediately below the lifted sheet is dragged upward and lifted. Such abundle 3 can be manufactured by a known multi-stand type or rotary typeinterfolder.

The pop-up type bundle 3 has a substantially rectangular parallelepipedshape having a pair of longitudinal side surfaces 3B in which foldededges 2C of sheets of the tissue paper 2 are lined up, a pair of shortside surfaces 3A in which the folded edges 2C are not lined up, and apair of flat surfaces (upper and lower surfaces) 3C connected to theshort side surfaces 3A and the longitudinal side surfaces 3B. The numberof sets of the tissue paper 2 constituting the bundle 3 is not limited,but is generally 120 to 240 as one set of 2 plies (two sheets stacked)or 3 plies (three sheets stacked). The size of the bundle 3 is notnecessarily limited, but a bundle of 150 sets of 2-ply tissue paper hasa height of about 40 to 50 mm×160 to 200 mm in a longitudinal direction(width)×90 to 110 mm in a short direction (depth).

Note that the top-bottom direction and the up-down direction in thepresent invention and the present specification are appropriatelychanged depending on the directions of the packaging bag, thefilm-packaged tissue assembly package, and the film-packaged tissue, anddo not mean absolute directions.

REFERENCE SIGNS LIST

-   14 Gusset packaging bag-   43 Side surface (gusset portion)-   44 Main unit section-   45 Handle section-   46 Front surface, Back surface-   41 Top surface side sealing portion-   42 Bottom surface side sealing portion-   40E Side portion of gusset packaging film in gusset tube mode-   40X Bottom surface side opening-   47 Finger hook hole-   5 Opening forming portion-   50 Opening portion-   51 Base point portion-   52 Widening perforated portion-   53 Extending perforated portion-   55 Lid-like edge piece-   56 Small edge piece-   61 Connecting portion between base point portion and widening    perforated portion-   61 Connecting portion between widening perforated portion and    extending perforated portion-   P Position corresponding to uppermost portion of article to be    packaged-   E Boundary position between front surface or back surface and side    surface-   L1 Separation distance between bottom-side ends of widening    perforated portions-   L2 Length of article to be packaged in width direction-   L3 Length of extending perforated portion in top-bottom direction-   L4 Length of packaging object in height direction-   1 Packaging article (film-packaged tissue)-   2 Tissue paper-   2A Inner side of folded sheet-   2B Folded piece-   2C Folded edge-   3 Bundle of tissue paper-   3A Short side surface-   3B Longitudinal side surface-   3C Upper and lower surfaces of bundle-   4 Packaging film-   4X Overlapping portion of packaging film-   4Y Extending portion of packaging film-   4Z Barrel opening of packaging film-   4A End surface-   10 Film-packaged tissue assembly package.

1. A packaging bag that is a gusset packaging bag comprising: a mainunit section having a front surface, a back surface, and both sidesurfaces connecting the front surface and the back surface to eachother, the main unit section storing an article to be packaged; and ahandle section formed on a top side of the main unit section byoverlapping the front surface and the back surface with each other,wherein at least one of the front surface and the back surface of themain unit section has an opening forming portion, and the openingforming portion includes: a base point portion formed in a regionlocated above a position corresponding to an uppermost portion of thearticle to be packaged that is stored in the main unit section and belowthe handle section; a pair of widening perforated portions having agradually widening separation distance in a side surface direction fromthe base point portion toward a bottom side opposite to the top side;and a pair of extending perforated portions continuous with other endsof the widening perforated portions on a base portion side and extendingin a top-bottom direction.
 2. The packaging bag according to claim 1,wherein the base point portion is a region surrounded by perforations orslits.
 3. The packaging bag according to claim 1, wherein a connectingportion between the base point portion and the widening perforatedportion is a cut portion.
 4. The packaging bag according to claim 1,wherein a connecting portion between the widening perforated portion andthe extending perforated portion is an easily tearable portion that ismore easily torn than another portion in the widening perforated portionand the extending perforated portion.
 5. The packaging bag according toclaim 1, wherein a boundary between the widening perforated portion andthe extending perforated portion or a vicinity thereof is located at aposition corresponding to an uppermost portion of an article to bepackaged that is stored in the main unit section or in a vicinitythereof.
 6. The packaging bag according to claim 1, wherein theextending perforated portion is in a range of 5 to 20 mm from a sidesurface.